Sealed backlit switch assembly

• US 4,885,443 A
• Filed: 11/29/1988
• Issued: 12/05/1989
• Est. Priority Date: 11/29/1988
• Status: Expired due to Fees

• Current Assignee: Tokheim Sas (Cognetas LLP)
• Original Assignee: Tokheim Sas (Cognetas LLP)
• Inventors: Orth, Charles M., Simcoe, Steven B., VanDaele, John J.
• Primary Examiner(s): Luebke, Renee S.
• Application Number:
  US07/277,302
• Time in Patent Office: 371 Days
• Field of Search: 200/513, 200/517, 200/314, 200/302.2, 200/296, 200/344
• US Class Current: 200/296
• CPC Class Codes: H01H 13/023 Light-emitting indicators for multi-layer switches H01H13/83

Abstract

A sealed backlit switch assembly including an integral body composed of an elastomeric material and having a hollow push button. The body is clamped to a panel by means of a printed circuit board and threaded fasteners whereby the body is sealed to the panel. The printed circuit board has an LED mounted thereon which is enclosed in a hollow push button which forms a part of the unitary molded body and thereby illustrates the push button.

Claims

1. A sealed switch assembly for mounting on a panel, said switch assembly comprising:

a unitary resilient housing, said housing including a mounting portion and a movable hollow push button;

a grommet means adapted to be mounted in an aperture in the panel for receiving said push button therein and for guiding said push button for substantially linear movement;

insulating means for mounting electrical components thereon, said insulating means including mounting means for securing said insulating means in a predetermined aligned position with said grommet and for clamping, said resilient housing between said panel and said insulating means whereby said resilient housing is sealed against said panel;

switch means mounted on said insulating means and adapted to be actuated by said push button upon operation thereof; and

light source means mounted on said insulation means and disposed inside said hollow push button for illuminating said hollow push button.

2. The switch assembly according to claim 1 wherein the housing includes a flexible web portion for movably connecting said push button to said mounting portion.

3. The switch assembly according to claim 1 including a generally cylindrical open space disposed intermediate said push button and said mounting portion.

4. The switch assembly according to claim 1 wherein said mounting means comprises a first plurality of apertures, said housing including a second plurality of apertures respectively aligned with said first plurality of apertures, said first and second plurality of apertures adapted to receive threaded fasteners for mounting said switch assembly on said panel.

5. The switch assembly according to claim 1 wherein said push button includes a ring shaped actuator for actuating said switch means.

6. The switch assembly according to claim 1 wherein said switch means comprises a membrane switch.

7. The switch assembly according to claim 1 wherein said housing mounting portion includes an integral sealing ring adapted to contact said panel and seal said housing thereto.

8. The switch assembly according to claim 1 wherein said light source means is an LED.

9. The switch assembly according to claim 1 wherein said housing is composed of silicone rubber material.

10. The switch assembly according to claim 1 including an integral flange means on said housing to secure said insulating means to said housing.

11. A sealed switch assembly for mounting on a panel, said switch assembly comprising:

a unitary resilient housing including a mounting portion, a movable hollow push button actuator, a flexible web-like portion movably connecting said push button to said mounting portion, a cylindrical hollow space disposed intermediate said push button and said mounting portion, said push button actuator including a ring shaped actuator on one end thereof;

an insulating circuit board adapted to be secured to the panel with said resilient housing clamped between said circuit board and said panel;

a sealing ring integrally formed on said housing for sealing said housing to said panel;

a grommet disposed in said cylindrical hollow space for guiding said push button substantially linearly upon actuation thereof;

switch means mounted on said circuit board and adapted to be actuated by said ring shaped actuator; and

a light source mounted on said insulating circuit board and disposed inside said hollow push button.

12. The switch assembly according to claim 11 wherein said flexible web-like portion is frusto-conically shaped.

13. The switch assembly according to claim 11 wherein said insulating circuit board includes a first plurality of apertures, said housing mounting portion includes a second plurality of apertures respectively aligned with said first plurality of apertures, said first and second plurality of apertures adapted to receive threaded fasteners for mounting said switch assembly on the panel.

14. The switch assembly according to claim 11 wherein said switch means comprises a membrane switch.

15. The switch assembly according to claim 11 wherein said housing is composed of silicone rubber.

16. A sealed switch assembly for mounting on a panel, said switch assembly comprising:

a unitary, resilient housing including a generally planar mounting portion having a generally cylindrical hollow recess therein, a generally hollow cylindrical push button disposed in said hollow recess for generally perpendicular movement to the plane of said housing, and a flexible web interconnecting said mounting portion and said push button;

a generally planar insulating member adapted to be secured to the panel to clamp said mounting portion between said panel and said insulating member, whereby said housing is sealingly clamped to said panel;

a ring-shaped switch mounted on said insulating member for actuation by an actuator ring portion of said push button;

a grommet secured to said panel for receiving said push button therein and for guiding said push button for substantially linear movement; and

a light source mounted on said insulating member and disposed inside said push button for illuminating said push button.

17. The switch assembly according to claim 16 wherein said insulating member includes a first plurality of apertures said housing including a second plurality of apertures respectively aligned with said first plurality of apertures, said first and second plurality of apertures adapted to receive threaded fasteners for mounting said switch assembly on the panel.

18. The switch assembly according to claim 16 wherein said switch comprises a membrane switch.

19. The switch assembly according to claim 16 wherein said housing mounting portion includes an integral sealing ring adapted to seal said housing to said panel,

20. The switch assembly according to claim 16 wherein said housing is composed of silicone rubber.

21. The switch assembly according to claim 16 wherein said light source is an LED.